832 results about "Oil drilling" patented technology

A high-performance near-pure zinc alloy, a preparation method therefor and a use thereof, relating to the technical field of zinc alloys. The alloy component is that the content of Zn is greater than or equal to 99.5%, and the remaining trace alloy elements include at least two of the following 14 elements: Mg, Mn, Li, Cu, Ag, Ca, Sr, Fe, Zr, Ti, Al, C, Ga, and Si. The alloy has the yield strength ≥ 250 MPa, the tensile strength ≥ 320 MPa, the elongation ≥ 25%, the mechanical property change during one year of room-temperature storage ≤ 5%, the maximum bending force ≥ 2 kN, the stress corrosion sensitivity factor ≤ 15%, the size of corrosion pits after 60 days of immersion ≤ 15 μm, and the standard deviation of the size of corrosion pits ≤ 3 μm. The alloy is suitable for the preparation of biodegradable stents, bone implant devices, medical staplers or anastomotic nails for intestines, blood vessels or nerves, vascular clamps, guided bone or tissue regeneration membranes, heart valve protheses, dura mater repair membranes, soluble bridge plugs and fracturing balls for oil drilling, zinc alloy die castings, electroplated zinc materials, building zinc materials, battery-grade zinc, printing-grade zinc, and zinc-based brazing alloys.

The invention provides an intelligent teaching-assistant system base LLM training method for a drilling simulator, and belongs to the technical field of petroleum drilling large language model training, and the method comprises the steps: obtaining the simulation data of the drilling simulator based on an intelligent teaching-assistant system base large language model, and carrying out the field self-adaptive pre-training; performing fine adjustment on the original weight by utilizing low-rank self-adaption, and performing operation steps and fault diagnosis generation; the method comprises the following steps: constructing an enterprise private knowledge base, training a large language model by utilizing retrieval enhancement generation, and obtaining a trained verification header through explicit supervision; a direct preference optimization loss function is defined, a direct preference optimization loss function of retrieval perception is obtained in combination with the verification head, the large language model is optimized, and large language model training is completed; according to the invention, an external professional knowledge base can be fused, an equipment operation mechanism can be understood, an intelligent assistant architecture with teaching guidance and error diagnosis capabilities is provided, and the intelligent level of the drilling simulator is improved.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electrically-controlled reducing cutter, which has the technical scheme that the extension and retraction of the cutter are accurately controlled by a control base driving motor and an electromagnet, wherein the control base driving motor comprises an MCU (Microprogrammed Control Unit) and a wireless communication module; the control base can receive a ground instruction and transmit an underground working state signal back in real time; meanwhile, the ratchet mechanism is matched with the electromagnet to achieve extending and retracting of the cutter position, and the pawl is always in close contact with the ratchet wheel under the action of the spring. And the lower shell is in threaded connection with the guide shoe. The cutting knife is driven to rotate through the transmission shaft, the cutting knife is controlled to stretch out and retract through the intelligent electric control system, continuous cutting of casing pipes with different pipe diameters can be achieved, the tripping frequency is reduced, and the casing pipe cutting efficiency in the well abandoning operation process is greatly improved.

The invention discloses a system for lowering and recovering a hydraulic pipe of an underwater blowout preventer, which comprises a winch drum, a driving assembly and a bearing seat are respectively arranged on shafts at two ends of the winch drum, the driving assembly is used for driving the winch drum to rotate, and the bearing seat is used for supporting the winch drum; a replaceable chain wheel and a hydraulic slip ring are sequentially mounted on the projecting shaft on the other side of the bearing seat, and the replaceable chain wheel is connected with a cable arrangement device through a chain; a hydraulic pipe of the underwater blowout preventer is led into the winch roller through the hydraulic sliding ring, then led to the cable arrangement device through the winch roller and finally led to the underwater blowout preventer through the cable arrangement device, and the cable arrangement device is used for enabling the hydraulic pipe to be arranged in order along the winch roller. The driving assembly is connected with a pneumatic control system which is used for controlling the driving assembly to drive the winch drum. According to the system, hydraulic pipes with different diameters can be automatically collected and released, the heat dissipation effect is good in the collecting and releasing process, and serious heating of the hydraulic pipes cannot be caused.

The invention relates to the technical field of nondestructive testing, and discloses a full-focusing phased array ultrasonic detection probe for a petroleum drilling tool and a detection method.The full-focusing phased array ultrasonic detection probe comprises a probe body; the probe body is attached to the end part of a drilling tool and the unthreaded outer wall of the drilling tool; a first array element is arranged at the end part, corresponding to a drilling tool, of the probe body and is used for simultaneously exciting to generate ultrasonic waves parallel to the end part of the drilling tool and receiving reflection echoes of internal thread defects of the drilling tool; a second array element is arranged at the position, corresponding to the unthreaded outer wall of the drilling tool, of the probe body and used for receiving reflection echoes of internal thread defects of the drilling tool, and the problem that the number of array elements capable of being arranged is too small due to the fact that a traditional full-focusing phased array ultrasonic detection method is limited by the small size of the end of the drilling tool is effectively solved. And early detection and qualitative and quantitative detection of the defects are realized.

The invention belongs to the technical field of petroleum drilling, and particularly relates to a mud scraping disc and a mud scraping device. The mud scraping disc is an elastic spiral mud scraping disc which surrounds the periphery of the drill rod by at least one circle; the mud scraping disc comprises supporting rings and mud scraping rings, and the supporting rings are spirally stacked in sequence; the outer rings of the mud scraping rings are connected with the inner rings of the supporting rings, the inner rings of the mud scraping rings are attached to the peripheral face of the drill rod, the thickness of the mud scraping rings is smaller than that of the supporting rings, and gaps are reserved between the mud scraping rings in the axial direction. The mud scraping disc is used for solving the problems that the mud scraping disc is not thorough in scraping and inconvenient to install. The spiral mud scraping disc surrounds the periphery of the drill rod, the mud scraping disc forms a whole, the supporting rings are arranged in a stacked mode to guarantee that each circle is pressed, the mud scraping rings can be attached to the surface of the drill rod, and therefore the mud scraping disc is not prone to inclining and overturning compared with a split type U-shaped mud scraping disc, and the mud scraping effect is better.

Oil drilling machine complete equipment comprises a crawler belt, a first platform and a second platform are movably assembled on the crawler belt, a derrick is further arranged on the first platform, the second platform is used for placing a drill rod, a lifting mechanism and a driving mechanism are further assembled on the derrick, and the lifting mechanism is connected with the driving mechanism. The first platform is further provided with a power system and a control machine room, the first platform is further provided with a protection enclosing wall, the protection enclosing wall wraps the derrick, the first platform is further provided with a drill hole, the drill hole is located under the driving mechanism, and a protection mechanism is assembled in the drill hole. A traditional mode that a power source is directly placed on a platform for holding and rotating is replaced through the driving mechanism, noise can be reduced through the driving mechanism, and power utilization is improved. By means of the protection mechanism, the drill rod can be protected without being taken out intermittently, the drill rod protection device can adapt to drill rods of different diameters and cannot be stuck, and the working efficiency is improved while drill rod abrasion is reduced.

The utility model belongs to the technical field of barracks, and particularly relates to a high-temperature-resistant assembly type petroleum drilling barrack which comprises an assembly type barrack body, a shell is installed at one end of the assembly type barrack body, an installation shell is installed at one end of the shell, a winding roller is rotationally connected in the shell, a winding motor is installed in the installation shell, and a winding roller is installed in the winding motor. A winding motor is installed on the shell, the output end of the winding motor is connected with a winding roller, sunshade cloth is connected to the winding roller, the end of the sunshade cloth is connected with a connecting plate, a storage assembly is arranged on the assembly type barrack body, and a rain shelter is installed at one end of the shell. According to the assembly type barrack, the storage assembly is arranged, the sunshade cloth can be folded and unfolded, the assembly type barrack body can be shaded through the sunshade cloth, the purpose of high temperature resistance is achieved, the use comfort degree is improved, and a good living and working environment is provided for drilling workers.

The invention discloses a combined piston rod type support oil cylinder which comprises a cylinder barrel, a mounting flange, a first rod body, a locking nut, a second rod body, a guide sleeve, a sleeve, a front gland and a rear gland, wherein the second rod body, the guide sleeve, the sleeve, the front gland and the rear gland are mounted in the cylinder barrel. The first rod body and the second rod body are in threaded connection to form a piston rod, trapezoidal threads are arranged on a rod body of the first rod body, the locking nut is in threaded connection with the first rod body, and the mounting flange is arranged on a barrel body of the cylinder barrel in a sleeving mode. The problem that the whole piston rod is difficult to maintain is solved, and quick replacement of the threaded section is achieved; hydraulic pressure maintaining is replaced by mechanical locking, and the oil leakage risk of the system is eliminated. The structure is particularly suitable for industrial equipment, oil drilling equipment and other high-load scenes needing long-term stable supporting, and the maintainability and reliability are remarkably improved while the bearing capacity is guaranteed.

The invention relates to the technical field of oil exploitation, in particular to a deep well drill rod conveying device which comprises a material box, sliding openings are evenly formed in the side walls of the two sides of the material box in the height direction of the material box, a lifting plate is arranged in each sliding opening, first lead screws are arranged at the bottoms of the two sides outside the material box, and first sliding blocks are in threaded connection with the first lead screws; a second lead screw is vertically arranged on the first sliding block and is in threaded connection with a supporting plate. After a third lead screw drives a second sliding block to slide, the second lead screw is driven to continue to rotate, the second lead screw drives a supporting plate to lift a lifting plate upwards, and meanwhile the lifting plate pushes the drill rod upwards and fills the position where the discharging drill rod is grabbed by the grabbing assembly. At the moment, the grabbing assemblies are still located at the same height to conduct grabbing operation instead of extending downwards to grab the drill rod, long-stroke vertical movement is not needed, the conveying and transferring time of the drill rod is naturally saved, and the overall operation efficiency of petroleum drilling is improved.

The invention provides a high-temperature-resistant shale inhibitor as well as a preparation method and application thereof, and belongs to the technical field of petroleum drilling. Natural polymer polyamino acid and carbon-rich solid matter biochar are used as raw materials to prepare the shale inhibitor, the biochar has the advantages of being high in thermal stability, porous, rich in surface oxygen-containing functional groups and the like, the biochar is combined with polyamino acid, and by means of the chemical effect of the polyamino acid and the physical blocking effect of the biochar, the shale inhibitor is prepared. The shale inhibitor can inhibit shale hydration expansion at high temperature and has good hydration dispersibility, and the prepared shale inhibitor is green and environment-friendly and has excellent high temperature resistance.

The invention discloses an ignition powder composition capable of preventing mistaken combustion and a preparation method and application thereof.The ignition powder composition capable of preventing mistaken combustion is prepared from, by weight, 30-75 parts of metal fuel particles, 8-35 parts of copper oxide, 5-25 parts of ammonium phosphate and 3-18 parts of coating agent.The application of the ignition powder composition capable of preventing mistaken combustion comprises the following steps that 1, the ignition powder composition capable of preventing mistaken combustion is prepared from, by weight, 30-75 parts of metal fuel particles, 8-35 parts of copper oxide, 5-25 parts of ammonium phosphate and 3-18 parts of coating agent; and at least one of an electric igniter or a chemical activating agent needs to be matched for use. The coated magnesium powder is used as metal fuel particles, and components such as copper oxide and ammonium phosphate are matched with the coated magnesium powder to jointly perform oxidation-reduction reaction; the pyrophoric powder composition can be ignited only by being matched with an electric igniter or a chemical activating agent, mistaken combustion caused by external factors or improper manual operation is avoided, and the pyrophoric powder composition is particularly suitable for occasions with high safety requirements such as industrial high-temperature welding ignition devices, petroleum drilling engineering or firework delayed ignition devices.

The invention relates to the technical field of oil drilling and production well control equipment, in particular to a composite sealing rotary blowout preventer capable of regulating and controlling pressure while drilling. The blowout preventer comprises an execution module, a transmission module and a pressure sensing module. According to the execution module, radial extrusion force is applied to the rubber core through a radial shrinkage mechanism composed of a rotating ring, a connecting rod and a push block, meanwhile, a piston outer sleeve is matched with an inner shell in the axial direction under the limiting effect of an adaptive ring, axial compression force is applied to the rubber core, and therefore composite sealing of the rubber core is achieved. The transmission module drives a transmission gear to be meshed with a gear seat through a motor and drives a rotating ring to rotate, and power is transmitted to the radial contraction mechanism. The pressure sensing module is used for monitoring wellhead pressure in real time and actively triggering the generator to operate according to pressure changes, and self-adaptive adjustment of the sealing state is achieved. The device is suitable for the PCWD working condition, active sealing adjustment can be achieved based on wellhead pressure changes, the sealing reliability is improved in an axial and radial composite compression mode, and the device is particularly suitable for complex stratums, pressure fluctuation and continuous drilling scenes.

The invention discloses a permanent magnet motor state monitoring control system based on petroleum drilling machine driving, and relates to the technical field of permanent magnet motor state monitoring. Comprising a data acquisition and construction module, a data preprocessing and feature extraction module, a dynamic monitoring and trend analysis module, a deep learning evaluation module and a fuzzy control and real-time compensation module, the collected real-time data are stored in a time sequence mode, a data set is established, and complete and accurate basic data are provided for subsequent analysis and model evaluation. Through real-time data acquisition, deep learning evaluation, fuzzy control optimization and error compensation, and adaptive regulation and control of dead zone time, the stability, reliability and energy efficiency of the petroleum drilling machine driving permanent magnet motor are improved, the short circuit risk, energy loss and harmonic damage are reduced, the system performance is optimized, and the operation efficiency is improved.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electric control intelligent coring drill bit which comprises a power module and a cutting module, a limiting switch is arranged in the cutting module, the drill bit normally drills, a rock core passes through the interior of the drill bit and enters a coring barrel, and when the top of the rock core in the coring barrel triggers the limiting switch, the limiting switch is switched on. The MCU receives a coring completion signal, the electromagnetic valve is controlled to be opened through the MCU, high-pressure drilling fluid enters a turbine cavity through a mandrel hole, under the action of the high-pressure drilling fluid, the turbine rotates to generate motion and power, the motion and the power are transmitted to the rotating ring through the rotating disc and the rotating sleeve, the rotating ring rotates to push the connecting rod, the connecting rod pushes the evenly-distributed cutting knives, and therefore coring is completed. And the uniformly distributed cutting knives and the coring cylinder form a sealing cavity, the cut rock core is placed in the sealing cavity, and the cut rock core is taken out after pulling out of the drill. The intelligent degree of the drilling coring bit can be effectively improved, and the drilling coring efficiency and success rate are effectively improved.

The invention provides an intelligent oil pipe cleaning and separating operation line which comprises a feeding station, a detection station and a to-be-cleaned station which are arranged side by side, a detection device and a first offline conveying belt are arranged at the two ends of the detection station correspondingly, and an electromagnetic heating device and a cleaning station are arranged at one end of the to-be-cleaned station; the detection station and the to-be-cleaned station are respectively provided with a plurality of jacking traction units at intervals along a straight line, each jacking traction unit comprises a liftable traction wheel, the traction wheels abut against the lower end of the oil pipe to roll, and the problems of automatic cleaning and flaw detection of the oil drill pipe are solved.

The invention discloses an electricity-to-oil intelligent digital driving method and system adaptive to a petroleum drilling working condition, and belongs to the field of petroleum drilling engineering.The method comprises the steps that petroleum drilling data are collected through a multi-source sensor group, and the collected data are sent to an edge gateway controller to be preprocessed; a multi-source data stream obtained through preprocessing is sent to a cloud end, and a multi-source database is constructed; the intelligent torque prediction model is deployed at the cloud end, real-time estimation of the current drill bit load torque is achieved according to data in the multi-source database, and a drill bit prediction torque value is obtained; the cloud end issues the predicted torque value obtained through calculation to the edge gateway controller, and the edge gateway controller generates an actual control instruction according to the received predicted torque value. Safe and stable operation of drilling operation can be effectively guaranteed.

The invention relates to the technical field of petroleum drilling tools, in particular to a shaft-torsion coupling percussion drilling speed increasing tool which comprises a shell, an upper water wheel, a torsion percussion assembly, a lower water wheel and an axial percussion assembly. The tool is reasonable and compact in structure, the tool is installed at the position close to a drill bit, the upper portion of the shell is connected with a drill collar, the lower portion of the shell is connected with the drill bit, fluid enters the upper portion of a central channel to impact an upper water wheel, the upper water wheel drives an upper rotating shaft to rotate, and a torsion impact assembly periodically impacts a fixing block in the circumferential direction, so that a circumferential impact effect is generated on an outer cylinder; the fluid continuously flows downwards to impact the lower water wheel, the lower water wheel drives the lower rotating shaft to rotate, the axial impact assembly periodically impacts the outer barrel in the axial direction, and then the axial impact effect is generated on the drill bit on the lower portion. The tool can transmit periodic torque and axial impact to the drill bit, the rock breaking speed of the drill bit is increased, the drilling period is shortened, and then cost and time are saved.

The invention belongs to the technical field of petroleum drilling engineering, and discloses a drilling fluid leakage position prediction positioning system, which comprises a data acquisition module, a data processing and analysis subsystem, an intelligent diagnosis subsystem, a scientific decision subsystem and a visualization module, and is characterized in that the data acquisition module is used for acquiring multi-source data in a drilling process in real time; and the data processing and analysis subsystem is used for carrying out data cleaning and feature extraction on the collected data. According to the scheme, multi-dimensional data of geology, engineering, fluid and the like are integrated, and through combination of machine learning and a mechanism model, the layer position of leakage, the type of leakage and the width of a crack are judged with high precision. According to the method, the leak-proof and leak-stopping scheme is designed, the leak-proof and leak-stopping material with good leak-stopping performance and high material quantitative score is recommended, the leak-proof and leak-stopping scheme is further designed, the well leakage analysis and leak-stopping technology of the fractured stratum has pertinence, effectiveness and scientificity, technical support is provided for leakage prevention and control, and therefore the service is provided for scientific and high-quality well drilling and efficient exploitation of oil fields.

The invention relates to the field of drilling fluids for petroleum drilling, and discloses a nano-micron deformation blocking agent as well as a preparation method and application thereof. The plugging agent comprises a core and a shell wrapping the core. Wherein the core is an inorganic micron material and an inorganic nano material, the shell is a network polymer, and the network polymer comprises a structural unit provided by a cross-linking agent, a structural unit provided by a hydrophobic monomer and a structural unit provided by an oil-soluble hydrophilic monomer. The nano-micron deformation plugging agent provided by the invention can be deformed under pressure, improves plugging of different sizes of nano-micron apertures of a stratum, reduces invasion of filtrate, and plays an important role in solving borehole wall instability of a long horizontal section broken stratum and improving stratum pressure bearing.

The invention discloses a self-adaptive wide-range adjustment low-emission internal combustion type emptying ignition device and a control strategy. The self-adaptive wide-range adjustment low-emission internal combustion type emptying ignition device comprises an incineration tower barrel, a main combustor, an ignition / fire detector, a main fuel gas process, an ignition gas process, an emergency emptying process, a wind barrier, an electric air door, an inspection manhole, a movable base, an emission monitoring system and an intelligent control system. The internal combustion type emptying ignition device adopts a closed design, so that open fire and black smoke are avoided during combustion; the cylinder body and the base are designed in a split manner, so that the transportation is convenient, and the universality of different working places is realized; the main combustor adopts a double-layer low-nitrogen combustion design, and self-adaptive wide-range adjustment can be realized according to the air release amount; the burner nozzle is provided with the low-nitrogen injection spray pipe, mixed combustion can be promoted, and low-nitrogen and low-carbon emission is achieved. The ground torch meets different requirements of industries such as petroleum drilling, natural gas extraction and chemical engineering, and can completely solve the problems that an existing ground torch technology is low in processing capacity and difficult to adapt to different working conditions, flames are prone to emerging out of a barrel, the combustion efficiency is low, and the environment is polluted and residents are disturbed.

The invention relates to an offshore oil drilling platform data acquisition method, device and equipment and a medium, and is applied to the technical field of data acquisition, and the method comprises the steps: obtaining historical monitoring data and current environment data; determining data acquisition frequencies of various data based on the historical monitoring data and the current environment data; acquiring monitoring data based on the data acquisition frequency; analyzing the monitoring data, and determining collection abnormal information; and determining an acquisition regulation and control strategy based on the acquisition abnormal information. The method has the effect of improving the data acquisition efficiency.

The invention discloses a real-time well drilling lithology identification method fusing double attention and wavelet transform. The method comprises the steps that firstly, drilling parameters are collected and preprocessed, and a depth domain analysis matrix is formed through a sliding window; then carrying out wavelet transform, and extracting and filtering amplitude and phase characteristics; secondly, constructing a double-attention model, capturing time domain dependence by using self-attention, and fusing time-frequency features by using cross attention; after the fusion features are subjected to linear projection and layer normalization, a lithology classification result is output through a multi-layer perceptron; according to the method, through fusion of double attention and wavelet transformation, collaborative modeling of time domain and frequency domain features is achieved, the problems that long-range dependence modeling is weak, cross-domain fusion is difficult and the like in a traditional method are solved, lithology can be accurately recognized in real time, and the method is suitable for being used for a large-scale popularization and application. The method does not need to depend on expensive logging-while-drilling equipment, and has high practical value in petroleum drilling engineering.

The invention relates to the technical field of petroleum drilling fluid loss reduction, and discloses an anti-divalent salt fluid loss agent for drilling fluid, which is prepared by the following steps: step 1, beta-cyclohexylamine and 6-chloro-1-hexene are subjected to a reaction to obtain alkenyl beta-cyclohexylamine; step 2, initiating polymerization of alkenyl beta-cyclopentadiene, a hyperbranched monomer pentaerythritol triallyl ether and 2-acrylamide-2-methylpropanesulfonic acid under the action of azobis (isobutylamidine hydrochloride), so as to obtain an intermediate A; 3, 3-dimethylamino-1-propylamine and palmitic acid are subjected to a reaction, and an intermediate 2 is obtained; 4, the intermediate 2 and benzyl chloride are subjected to a reaction, and quaternary ammonium salt modified fatty acid is obtained; and 5, stirring and mixing the intermediate A, quaternary ammonium salt modified fatty acid and coupling agent modified walnut powder to obtain the divalent salt resistant filtrate reducer for the drilling fluid. The anti-divalent salt filtrate reducer for the drilling fluid has a relatively good anti-divalent salt effect.

The invention provides an electric elevator, and relates to the technical field of petroleum drilling, the electric elevator comprises an elevator main body, a locking door unit and a driving unit, a bayonet is formed in the elevator main body, the locking door unit comprises a valve and a locking door which are hinged to the two ends of the bayonet respectively, and the driving unit is an opening and closing electric push rod with a bidirectional output end; the two output ends of the opening and closing electric push rod are connected with the valve and the locking door through corresponding transmission units respectively and used for driving the valve and the locking door to be matched with the bayonet so that the bayonet can form a closed loop. The electric elevator is further connected with a turnover mechanism, and the turnover mechanism is used for driving the electric elevator to turn over by 90 degrees, so that a bayonet of the electric elevator rotates to the horizontal direction from the vertical direction. The structure is simplified, one electric push rod is adopted, the cost is greatly reduced, elevator opening and closing are achieved by opening and closing the electric push rod, electric driving is adopted, and the problems that a hydraulic cylinder operates slowly in the hydraulic low-temperature environment, too much oil leaks from a pipeline, and installation and maintenance are inconvenient can be thoroughly solved.

The present invention relates to a preparation method and application of a composite while-drilling leak-proof agent, and belongs to the field of oil drilling engineering technology. The composite while-drilling leak-proof agent is prepared from the following components in percentage by mass: 20-45% nano-composite particles, 15-35% multi-stage fiber-reinforced network materials, 10-20% intelligent response plugging agent, 5-10% high-temperature resistant additive, 1-5% dispersant, and the balance is deionized water, and the total content of each component is 100%. The composite while-drilling leak-proof agent provided by the present invention introduces a core-shell structured thermosensitive resin to realize a three-dimensional synergistic mechanism of "nano-composite particle filling-multi-stage fiber network bridging-intelligent response curing", thereby realizing efficient and environmentally friendly plugging of ultra-high temperature and high-pressure formations. The success rate of single plugging is increased from 45% to 92%, and the average operation time is shortened by 60%, providing an efficient solution for deep and ultra-deep drilling.

The invention relates to the technical field of petroleum drilling equipment, in particular to a novel eccentric rotating casing guiding shoe and a using method thereof. The eccentric rotating sleeve guide shoe comprises a lower shell, the top of the lower shell is rotationally connected with an upper shell, the bottom of the lower shell is connected with a telescopic sleeve, the bottom of the telescopic sleeve is connected with an eccentric guide head, a plurality of spiral guide strips are arranged on the circumference of the outer side wall of the lower shell at equal intervals, and the inner side wall of the lower shell is connected with a first turbine. The telescopic sleeve comprises an outer cylinder coaxially connected with the lower shell, an inner cylinder coaxially connected with the eccentric guide head and a spring respectively connected with the outer cylinder and the inner cylinder, and a plurality of spiral blades with downward tips and extending towards the eccentric guide head are arranged on the circumference of the outer side wall of the outer cylinder at equal intervals. The reaming efficiency is high, the labor intensity of workers can be reduced, and it can be fully guaranteed that the casing pipe string is smoothly lowered to the preset position.

The petroleum drilling system comprises a base, the base is horizontally placed on the ground, a through hole is formed in the middle of the base, a transverse plate is arranged above the base in a lifting mode, a first motor is arranged above the transverse plate, and an outer pipe is arranged below the transverse plate; the top of the outer pipe is connected with an output shaft of the first motor pair, a drill bit is arranged at the bottom of the outer pipe, and a hole channel is formed in the drill bit in a penetrating mode and communicates with the outer pipe. An inner pipe is arranged on the inner side of the outer pipe, a plurality of adjusting assemblies are arranged below the inner pipe, each adjusting assembly is connected with the inner side wall of the outer pipe, and the size of an opening in the upper end of a space formed by the adjusting assemblies is larger than that of an opening in the lower end of the space. A water pump and a liquid tank are further arranged on the base; the water pump can control the liquid tank to enable drilling fluid to enter and exit from the inner pipe and the outer pipe; by replacing the manufacturing material of the inner pipe, the overall mass of the inner pipe is lighter, and then the fixing degree of the plug pin to the inner pipe is improved.

The present application belongs to the field of oil drilling technology, and discloses a PDC drill bit for rock breaking by pressure pulse impact oscillation. The specific technical scheme is as follows: the PDC drill bit for rock breaking by pressure pulse impact oscillation is composed of an upper threaded joint, a shell, a jet pulse block and a drill bit. The jet pulse block is composed of a fluid inlet, a left feedback channel outlet, a right feedback channel outlet, a left fluid channel, a right fluid channel, a left backflow feedback inlet, a left backflow annular fluid channel, a right backflow feedback inlet, a right backflow annular fluid channel, a fluid outlet and a fluid outlet cavity. After the drilling fluid passes through the upper threaded joint, it enters the jet pulse block from the fluid inlet, and then passes through the fluid outlet and flows out from the drill bit water eye. When the drilling fluid passes through the jet pulse block, the flow direction of the drilling fluid will change periodically due to the action of the feedback channel, and a pressure pulse will be generated, forming impact oscillation, and thus accelerating the rock breaking and drilling of the drill bit. The present application has the function of improving the rock breaking efficiency of the drill bit by relying on pressure pulse impact oscillation.

The utility model relates to the technical field of petroleum drilling fluid detection equipment, in particular to petroleum drilling fluid detection equipment which comprises a box body, a motor and a stirring mechanism, the stirring mechanism comprises a rotating shaft, a replacement assembly, a rotating roller and a plurality of auxiliary stirring assemblies, and each auxiliary stirring assembly comprises a rotating piece, an auxiliary shaft and an auxiliary roller. A motor and an electric heating block are started, while the electric heating block heats drilling fluid, a movable column drives a rotating shaft to rotate, a rotating roller drives a plurality of auxiliary stirring assemblies to rotate, under the action of a rotating piece and centrifugal force, an auxiliary shaft is erected, and the auxiliary roller is driven to rotate along with the rotating roller, so that the drilling fluid is fully stirred; the problems that in the prior art, stirring is conducted only through a roller, the stirring effect is common, heating is not uniform, and the detection reliability is reduced are solved, and the effects that stirring and heating are sufficient, and the detection reliability is improved are achieved.